are you with in the 3/36? Leaf springs are part of the TSB. I dont know if there is a difference from the CN to US TSB. Did you view the PDF TSB files?Is there a difference between canadian tsb's and U.S. tsb's? My '05 tacoma is bottoming out and the dealer won't do anything and they say SPRINGS are not covered, only shocks, bushings etc. and they say I have a spring problem?